地质通报2017，Vol.36Issue(4)：582-590,9.
辽宁金羊盆地羊D1井油砂地球化学特征及意义
Saturated hydrocarbon geochemical characteristics of the oil sand from YD1 well in Jinyang Basin and its significance for oil and gas exploration
摘要
Abstract
Recently researchers from Shenyang Geological Survey of CGS made several new discoveries in geological well YD1 in Jinglingsi-Yangshan basin (Jinyang Basin).During the drilling of YD1 the authors detected several oil and gas showings in the fractures of the drilling core in Mid-Jurassic Tiaojishan Formation (J2t) which was mainly composed of intermediate igneous rocks.The characteristics of biomarkers from YD1 oil sand were analyzed by the method of gas chromatography and gas chromatography mass spectrometry (GC,GC-MS).The results show that the two oil sand samples have similar geochemical characteristics:the n-alkane distribution exhibits one sole peak pattern,and the dominant peaks are nC21 and nC22 separately;there is no clear odd or even carbon number predominance for the n-alkanes,and thus the carbon preference index (CPI) is only slightly higher than 1;the samples have low Pr/Ph ratios.The terpene is characterized by the normal distribution of C23 tricyclic terpene and similar abundance of C24 tetracyclic terpene and C26 tricyclic terpene,with a relatively abundant value of gammacerane.The regular steranes are dominated by the C27-steranes,and their relative abundance is in the order of C27＞C29＞C28,exhibiting the "V" distribution pattern.These biomarkers' characteristics indicate that the source rocks are matured and predominated mainly by planktonic/algal organic matter.The source rocks were deposited in a lacustrine environment with a high-salinity stratified water column and anoxic conditions.The oil-source correlation results showed that the crude oil from the samples was possibly derived from the source rock in Early Jurassic Beipiao Formation (J1b).The results indicate that the source rock from Beipiao Formation is widely spread in Jinyang Basin and has good oil and gas potential,and hence Jinyang Basin is a petroliferous basin with good potential for oil and gas exploration.关键词
金羊盆地/羊D1井/油砂/生物标志化合物/油岩对比Key words
Jinyang Basin/YD1 well/oil sand/biomarker/oil-source rock correlation分类
天文与地球科学引用本文复制引用
张涛,李永飞,孙守亮,郜晓勇,周铁锁,孙鹏..辽宁金羊盆地羊D1井油砂地球化学特征及意义[J].地质通报,2017,36(4):582-590,9.基金项目
中国地质调查局项目《松辽外围南部盆地群油气基础地质调查》(编号:DD20160167)和《辽宁金羊盆地油气基础地质调查》(编号:12120115001301) （编号:DD20160167）
